Hard disk comb, actuator, and manufacturing method of hard disk comb

Abstract

A hard disk comb includes: a main body including a groove; and an arm joined to the main body. A part of the arm is disposed inside the groove, and an opening edge of the groove is joined to an upper surface of the arm.

What is claimed is: 
     
         1 . A hard disk comb comprising:
 a main body comprising a groove; and   an arm joined to the main body, wherein   a part of the arm is disposed inside the groove, and   an opening edge of the groove is joined to an upper surface of the arm.   
     
     
         2 . The hard disk comb according to  claim 1 , wherein
 the arm is in a plate shape, and   the upper surface of the arm is joined to the main body but a lower surface of the arm is not joined to the main body.   
     
     
         3 . The hard disk comb according to  claim 1 , wherein the arm is welded to the main body. 
     
     
         4 . The hard disk comb according to  claim 3 , wherein the arm is laser-welded to the main body. 
     
     
         5 . The hard disk comb according to  claim 1 , wherein the main body is joined to the arm at three or more joining portions that are not disposed on a straight line. 
     
     
         6 . The hard disk comb according to  claim 1 , wherein
 the arm comprises an aluminum layer and SUS layers disposed on both surfaces of the aluminum layer, and   the main body is formed of SUS.   
     
     
         7 . The hard disk comb according to  claim 1 , wherein a gap is between the arm and an inner surface of the groove. 
     
     
         8 . The hard disk comb according to  claim 1 , wherein a part of an inner surface of the groove is an inclined surface. 
     
     
         9 . The hard disk comb according to  claim 8 , wherein the inclined surface faces the arm with a gap between the arm and the inner surface of the groove. 
     
     
         10 . An actuator comprising:
 the hard disk comb according to  claim 1 ;   a suspension attached to a tip end portion of the arm;   a magnetic head attached to the suspension;   a coil holding portion fixed to or integrated with the main body; and   a coil held by the coil holding portion.   
     
     
         11 . A hard disk comb comprising:
 a main body comprising a groove; and   an arm joined to the main body, wherein   a part of the arm is disposed inside the groove,   the arm comprises an aluminum layer and SUS layers on both surfaces of the aluminum layer, and   the main body is made of SUS.   
     
     
         12 . A manufacturing method of a hard disk comb comprising:
 preparing a main body comprising a groove;   inserting an arm and a joining jig in the groove;   joining the arm to the main body; and   extracting the joining jig from the groove.